Rude stone monuments in all countries : their age and uses (1872)
Fergusson, James, 1808-1886 · London, J. Murray · leaf 346
Chap. VII. DRENTHE—HUNEBEDS. 321 similar either in arrangement or construction. As will be seenfrom the annexed view of one near Ballo 1 (woodcut No. 121),they are formed of unshaped granite boulders. Sometimes, itmay be, artificially split, but certainly untouched by the chisel. … ^:- ■ ■■121. Dolmen at Ballo. From a Photograph. All that has apparently been done has been to select those mostappropriate in form for the purposes to which they were to beapplied, and then rudely to heap them one upon the other, butin such a maimer as to leave wide gaps everywhere between…
Megalithic monuments
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